Electromagnetic steel sheet
US12125620B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Aug 13, 2019 |
| Grant date | Oct 22, 2024 |
| Priority date | — |
| Expiry date | Jul 7, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/64
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An electrical steel sheet includes a main surface and an end surface. The electrical steel sheet includes a base material part and an end surface nitrided layer that is provided on the end surface in a manner adjacent to the base material part and that contains nitrogen. The end surface nitrided layer has a surface hardness of 430 HV or more and 1250 HV or less. The end surface contains nitrogen in an amount higher than a nitrogen concentration at the main surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.